Radon Test Results
The link below will open a PDF document which lists test
kit data as supplied to the Department from the certified radon laboratory and
testing community. The report will show you the radon levels found in
homes near your area. However, radon levels can be different from house to
house, even on the same street, so do not rely on the database to determine
whether your home may have radon. CDPH recommends that all
homeowners test for radon, regardless of your local zip code
results.
Data includes all short-term test methods, and all house types.
This data is provided for informational purposes only and is not suitable
for statistical or geospatial analysis. For reference, the U.S. EPA has
established their action level at 4.0 pCi/L, and they have estimated that the
national average indoor radon concentration at 1.3 pCi/L.
California Radon Test
Results (PDF)
USPS
ZIP Code Lookup -
Not
sure what ZIP codes are in your community? Look them up using your city or
address.
Indoor Radon Program